Owatrol E B mix-in bonding primer produces a first coat and a bonding primer to help water based paints stick to unstable surfaces. Owatrol E B mix-in bonding primer works as a stabalizer, firmly connecting the first coat of paint to the unstable surface such as powdery chalky walls, as well as hard to paint surfaces like plastic and varnished surfaces. It stirs in easily, and does not alter the original colour of the paint